Photosensitive member incorporating styryl compound

Abstract

A photosensitive member according to the present invention comprises an electrically conductive substrate and a photosensitive layer comprising a binder resin and a styryl compound dispersed therein and represented by the general formula (I), ##STR1## wherein R 1 , R 3 and R 5 each represent hydrogen or an alkyl, aryl, aralkyl or heterocyclic group, the aryl, aralkyl and heterocyclic groups having or not having a substituent, R 2 , R 4 and R 6 each represent a substituted or unsubstituted aryl, aralkyl or heterocyclic group, R 1 and R 2 , R 3 and R 4 , and R 5 and R 6 taken together form a ring, and R 7 , R 8 and R 9 each represent hydrogen or an alkyl, alkoxyl, aralkyl or aryl group. A photosensitive member of this structure exhibits high sensitivity, is outstanding in the ability to retain charges and in charge transporting ability and less prone to deterioration when repeatedly used.

What is claimed is: 
     
       1. A photosensitive member which comprises: an electrically conductive substrate; and   a photosensitive layer comprising a binder resin and a styryl compound dispersed therein and represented by the general formula (I), ##STR10##  wherein R 1 , R 3  and R 5  each are hydrogen or an alkyl, aryl, aralkyl or heterocyclic group, the aryl, aralkyl and heterocyclic groups having or not having a substituent, R 2 , R 4  and R 6  each are a substituted or unsubstituted aryl, aralkyl or heterocyclic group, R 1  and R 2 , R 3  and R 4 , and R 5  and R 6  taken together form a ring, and R 7 , R 8  and R 9  each are hydrogen or an alkyl, alkoxyl, aralkyl or aryl group.   
     
     
       2. A photosensitive member as claimed in Claim 1 wherein said styryl compound is dispersed in the binder resin in an amount of 0.01 to 2 parts by weight per part by weight of the resin. 
     
     
       3. A photosensitive member as claimed in claim 1 wherein said photosensitive layer comprises a charge generating layer and a charge transporting layer, said styryl compound being contained in said charge transporting layer. 
     
     
       4. A photosensitive member as claimed in claim 1 wherein said styryl compound is dispersed in the binder resin in an amount of 0.03 to 1.3 parts by weight per part by weight of the resin. 
     
     
       5. A photosensitive member as claimed in claim 3 wherein said charge generating layer comprises phthalocyanine. 
     
     
       6. A photosensitive member as claimed in claim 3 wherein said charge generating layer comprises a disazo pigment.